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Multichannel quantum-defect theory for slow atomic collisions

Bo Gao·Eite Tiesinga·Carl J. Williams·Paul S. Julienne
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Abstract

We present a multichannel quantum-defect theory for slow atomic collisions that takes advantages of the analytic solutions for the long-range potential, and both the energy and the angular-momentum insensitivities of the short-range parameters. The theory provides an accurate and complete account of scattering processes, including shape and Feshbach resonances, in terms of a few parameters such as the singlet and the triplet scattering lengths. As an example, results for $^{23}$Na-$^{23}$Na scattering are presented and compared close-coupling calculations.

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Bo Gao, Eite Tiesinga, Carl J. Williams, Paul S. Julienne. 2005-08-10. Multichannel quantum-defect theory for slow atomic collisions. https://doi.org/10.1103/physreva.72.042719

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